A clean, fast, and sustainable construction site: how we optimize each residential HVAC installation for stable, four-season comfort, even along Laval's main boulevards.
Project context and comfort objectives
In Chomedey, a residential area with a mix of plexes and single-family homes, our client wanted to upgrade their air conditioning system and benefit from supplemental heating in the mid-seasons. We recommended a Sharp wall-mounted heat pump (compact Eco Inverter outdoor unit with Plasmacluster technology) to combine energy efficiency, air quality, and quiet sound.
Device and configuration selected
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Machine type: single-zone wall-mounted heat pump .
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Brand: Sharp (Eco Inverter range, Plasmacluster ionization technology for indoor air quality).
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Capacity: sized according to the main air-conditioned surface area and the building envelope (thermal load calculations carried out by our teams).
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Objectives: efficient summer air conditioning, additional heating down to low temperatures, filtration and odor reduction through ionization.
At AirGreen, we always size capacity based on actual thermal losses and gains (orientation, fenestration, insulation, infiltration), never "by eye." This approach avoids short cycles, additional electrical costs, and discomfort.
Outdoor installation: stability, clearances and maintenance
The outdoor unit sits on a raised galvanized aluminum stand , anchored to the ground and wall to resist freeze-thaw and maintain clear clearance in front of the propeller.
Key heights:
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Raising the height by approximately 30–40 cm to maintain free suction, facilitate snow removal and prevent premature corrosion.
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Side and rear clearances respected to optimize airflow and simplify maintenance.
The raised support also limits vibration transmission to the slab and keeps the unit away from water accumulations during heavy rain. Direct access from the terrace and the side door allows for quick service without crossing the living areas.
Refrigeration path and condensate management
The lineset route is short and direct: crossing the rear wall behind the unit to reach the interior head.
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Estimated length: short (≈ 2–3 m), reducing pressure losses and improving seasonal efficiency.
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Continuous insulation of refrigeration pipes to limit heat gain in summer and frost in winter.
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Visible gravity evacuation of condensates (white pipe), preferred when the slope allows it in order to avoid the addition of a pump and its associated maintenance.
When the architecture requires it, we use finishing ducts (capping) arranged on the facade; here, the short path behind the unit makes the line discreet without any major visual addition.
Power supply and protections
The heat pump is connected to a dedicated circuit with a circuit breaker at the main panel, in accordance with Quebec standards. An external disconnect switch (or proximity circuit breaker, depending on the configuration) is provided to ensure safe work. We systematically check the grounding , the panel capacity and the quality of the connections to avoid voltage drops that could be harmful to inverter compressors.
Key steps of installation
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Checking the structure and clearances, precise choice of location.
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Controlled drilling of the wall with waterproof wall pass-through and vapor barrier.
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Installation of the raised support , leveling and vibration damping.
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Refrigeration connection (clean bending, torque tightening), vacuum and leak tests.
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Electrical connection with compliant protections.
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Commissioning : fan settings, shutters, target temperatures and explanation of best practices to the customer.
Result: targeted comfort and controlled consumption
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Quiet air conditioning of living spaces, without aggressive drafts.
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Efficient supplemental heating in spring and fall, limiting the demand on the main systems.
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Air quality enhanced by Plasmacluster ionization, useful for reducing odors and particles.
Points of attention that we manage for you
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Winter defrosting: keep the area under the unit clear for drainage; our elevation helps with this.
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Snow and ice: provide a snow guard or screen if the roof projects accumulations above.
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Noise and neighborhood: fine speed adjustments and compliance with clearances for discreet operation.
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HVAC maintenance: cleaning filters, annual inspection of pressures and connections; regular maintenance preserves performance and longevity.
Grants and Eligibility
Several assistance programs in Quebec target high-efficiency heat pumps . Eligibility depends on the low-temperature performance of the chosen model and installation compliance. We will work with you to validate the technical data sheets and criteria in effect for Montreal, Laval, Longueuil, the North Shore, and the South Shore , and prepare the necessary filing documents.
Usage and optimization tips
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Maintain a stable setpoint (rather than large deviations) to take advantage of the inverter compressor.
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Clear the suction and discharge openings ; avoid storing objects in front of the unit.
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Schedule an annual maintenance reminder with AirGreen: residual vacuum check, probes, fans, clamps and deep cleaning.
Why AirGreen for your project in Laval and Greater Montreal?
We combine thermal diagnostics , meticulous installation and responsive after-sales service . Our experience in the Chomedey, Vimont, Duvernay neighborhoods, as well as in Montreal intramural , the South Shore and the North Shore , allows us to anticipate local constraints (snow, frost, access, noise) and deliver lasting comfort, without compromising on aesthetics.
Need a wall-mounted heat pump installation in Laval or elsewhere in Greater Montreal? We'll schedule a technical visit, estimate the right capacity, review your grant options, and ensure a clean, safe, and optimized installation for your home.
Keywords: heat pump , wall-mounted heat pump , HVAC installation , HVAC maintenance , Sharp , Montreal , Laval , Longueuil , North Shore , South Shore .